Solar Coronal Heating
Researching active regions and quiet Sun plasmas by developing new analyses of the multi-wavelength Solar Dynamics Observatory/ Atmospheric Imaging Assembly (SDO/AIA) data. Use physics-based coronal flux tube models to understand coronal heating and for the interpretation of line-of-sight effects in coronal observations.
Periodic solar wind density structures
Investigating ambient solar wind structures and their source locations using the white light telescopes on Solar TErrestrial RElations Observatory/ Sun Earth Connection Coronal and Heliospheric Investigation (STEREO/SECCHI).
3/2012
-
Present
Research Astrophysicist
NASA Goddard Space Flight Center,
Greenblet, MD, USA
2010
-
2012
NASA Postdoctoral Fellow
Solar Physics Laboratory, NASA Goddard Space Flight Center,
Greenbelt, MD, USA Investigation of coronal heating in active region loops using time series analysis, physics-based coronal loop models, and the multi-wavelength SDO/AIA data.
2005
-
2009
Graduate Research Assistant
Department of Astronomy, Boston University,
Boston, MA, USA Studied non-turbulent periodic density structures in the ambient solar wind, their affect on the Magnetosphere, focusing on the ULF wave response, and their possible source region and source mechanism. The main tools used were spectral analysis and time series analysis of Wind/Solar Wind Experiment data, Solar TErrestrial RElations Observatory/ Sun Earth Connection Coronal and Heliospheric Investigation white light images, and Geostationary Operational Environment Satellites magnetometer data.
2004
-
2004
Graduate Teaching Fellow
Department of Astronomy, Boston University,
Boston, MA, USA Responsible for teaching four Astronomy 202 lab sections per week; taught astronomy and space physics material complementary to main lectures; running laboratory experiments and discussion/office hours; grading homework assignments and lab reports. Attended bi-weekly class lectures and weekly teaching fellow class.
Ph.D. in Astronomy, Boston University, Boston, MA, January, 2010
"Periodic Solar Wind Density Structures"
M.A. in Astronomy, Boston University, Boston, MA, May, 2007
B.S. in Astronomy and Physics, Univrsity of Washington, Seattle, WA, June, 2004
American Geophysical Union (AGU)
Space Physics and Aeronomy (SPA), outstanding student paper awards committee co-chair and member of AGU SPA executive council, August 2011-Feb 2013
Outstanding student paper awards judge, Fall AGU meeting, 2009-present
Co-organizer and session chair of Fall AGU SPA session titled ‘Comparing Models of the Solar Magnetic Field With Data’, 2011
Lead organizer and session chair of Fall AGU SPA session titled ‘Recent Advances in Solar Coronal Heating’, 2012
International 'Coronal Loops' Workshop
Steering Committee member, May 2012-present
Science Organizing Committee, 2013-present
Goddard Space Flight Center New and Developing Professionals Advisory Committee, May 2011-present
Taught introduction to solar/astronomy observational techniques course at the Goddard Space Flight Center Educator’s Workshop, July 2012
Solar and space physics presentation at the Glenn Dale Elementary School Career Day, May 2012
Solar and space weather presentation as part of The Girl Scouts of America 100th anniversary celebration, ‘The Scientist is In’ event, July 2012
Served on the GSFC Science Panel for Summer Interns, August 2012
NSF Solar, Heliospheric, and INterplanetary Environment program (SHINE)
SHINE student representative, 2008 and 2009.
Co-GEM-SHINE student day leader (GEM-SHINE 2008 meeting)
Served as a reviewer on the SHINE National Science Foundation research proposals panel review
Other Working group leader at the ‘Tracing the Connections of Eruptive Events’ workshop, Fall, 2012
Women of Aerospace,
2013
-
Present
American Astronomical Society (AAS),
2010
-
Present
American Geophysical Union,
2005
-
Present
Refereed
Kepko, L., N. Viall, S. K. Antiochos, et al. 2016. "Implications of L1 observations for slow solar wind formation by solar reconnection."
Geophysical Research Letters,
43
(9):
4089–4097
[10.1002/2016gl068607]
Uritsky, V., J. M. Davila, N. Viall, and L. Ofman. 2013. "Slow mode waves and quasi-periodic upflows in the multi-temperature solar corona as seen by the SDO."
AAS/Solar Physics Division Meeting,
44:
#104.05-.
Viall-Kepko, N. M., and J. A. Klimchuk. 2013. "Modeling the Diffuse Active Region Corona with Impulsive Nanoflare Heating."
ApJ,
771
(115):
[10.1088/0004-637X/771/2/115]
Viall-Kepko, N. M., and J. A. Klimchuk. 2012. "Evidence for Widespread Cooling in an Active Region Observed with the SDO Atmospheric Imaging Assembly."
ApJ,
753
(35):
[Full Text (Link)]
[10.1088/0004-637X/753/1/35]
Thompson, B., P. Demoulin, C. Mandrini, et al. 2011. "Pulsed Flows Along a Cusp Structure Observed with SDO/AIA."
Bulletin of the American Astronomical Society,
2117-:
Viall-Kepko, N. M., and J. A. Klimchuk. 2011. "Patterns of Nanoflare Storm Heating Exhibited by an Active Region Observed with Solar Dynamics Observatory/Atmospheric Imaging Assembly."
The Astrophysical Journal,
738
(1):
24
[10.1088/0004-637X/738/1/24]
Viall-Kepko, N. M., H. E. Spence, A. Vourlidas, and R. Howard. 2010. "Examining Periodic Solar-Wind Density Structures Observed in the SECCHI Heliospheric Imagers."
Solar Physics,
261
(175):
[10.1007/s11207-010-9633-1]
Viall-Kepko, N. M., H. E. Spence, and J. Kasper. 2009. "Are periodic solar wind number density structures formed in the solar corona?"
Geophysical Research Letters,
36
(23):
L23102
[10.1029/2009GL041191]
Viall-Kepko, N. M., E. L. Kepko, and H. E. Spence. 2009. "Relative occurrence rates and connection of discrete frequency oscillations in the solar wind density and dayside magnetosphere."
J. Geophys. Res.,
114
(A01201):
[10.1029/2008JA013334]
Viall-Kepko, N. M., E. L. Kepko, and H. E. Spence. 2008. "Inherent length-scales of periodic solar wind number density structures."
J. Geophys. Res.,
113
(A07101):
[10.1029/2007JA012881]
Refereed
Kepko, L., N. Viall, S. K. Antiochos, et al. 2016. "Implications of L1 observations for slow solar wind formation by solar reconnection."
Geophysical Research Letters
43
(9):
4089–4097
[10.1002/2016gl068607]
Uritsky, V., J. M. Davila, N. Viall, and L. Ofman. 2013. "Slow mode waves and quasi-periodic upflows in the multi-temperature solar corona as seen by the SDO."
AAS/Solar Physics Division Meeting
44
#104.05-
Viall-Kepko, N. M., and J. A. Klimchuk. 2013. "Modeling the Diffuse Active Region Corona with Impulsive Nanoflare Heating."
ApJ
771
(115):
[10.1088/0004-637X/771/2/115]
Viall-Kepko, N. M., and J. A. Klimchuk. 2012. "Evidence for Widespread Cooling in an Active Region Observed with the SDO Atmospheric Imaging Assembly."
ApJ
753
(35):
[Full Text (Link)]
[10.1088/0004-637X/753/1/35]
Thompson, B., P. Demoulin, C. Mandrini, et al. 2011. "Pulsed Flows Along a Cusp Structure Observed with SDO/AIA."
Bulletin of the American Astronomical Society
2117-
Viall-Kepko, N. M., and J. A. Klimchuk. 2011. "Patterns of Nanoflare Storm Heating Exhibited by an Active Region Observed with Solar Dynamics Observatory/Atmospheric Imaging Assembly."
The Astrophysical Journal
738
(1):
24
[10.1088/0004-637X/738/1/24]
Viall-Kepko, N. M., H. E. Spence, A. Vourlidas, and R. Howard. 2010. "Examining Periodic Solar-Wind Density Structures Observed in the SECCHI Heliospheric Imagers."
Solar Physics
261
(175):
[10.1007/s11207-010-9633-1]
Viall-Kepko, N. M., H. E. Spence, and J. Kasper. 2009. "Are periodic solar wind number density structures formed in the solar corona?"
Geophysical Research Letters
36
(23):
L23102
[10.1029/2009GL041191]
Viall-Kepko, N. M., E. L. Kepko, and H. E. Spence. 2009. "Relative occurrence rates and connection of discrete frequency oscillations in the solar wind density and dayside magnetosphere."
J. Geophys. Res.
114
(A01201):
[10.1029/2008JA013334]
Viall-Kepko, N. M., E. L. Kepko, and H. E. Spence. 2008. "Inherent length-scales of periodic solar wind number density structures."
J. Geophys. Res.
113
(A07101):
[10.1029/2007JA012881]
